Possibly the easiest way to make a metal throwing star.
Step 1: What You Need
A can of anything (tuna works well)
A little opener (in the picture)
A can opener
Step 2: First...
Cut out one part, than go straight across and cut another.Do that over until it has eight parts out.(the top should look like this)
Step 3: Second...
Open the can like you normally would and fold out the tabs.
Step 4: Third...And Last
Chuck it at your brother and eat the tuna!WARNING: May cause injuries, I am not responsible.